https://codeforces.com/group/n3sTiYtHxI/contest/348902/my

#include <iostream>
#include<bits/stdc++.h>
#define ll long long
#define ull unsigned long long
#define pi  3.14159
//#define ceil(w, m) (((w) / (m)) + ((w) % (m) ? 1 : 0))
using namespace std;

void yasmeen_fakhri(){
  ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);
  #ifndef ONLINE_JUDGE
    freopen("input.txt", "r", stdin), freopen("output.txt", "w", stdout);
  #endif
}

bool is_vowel(char ch){
  return (ch == 'a' || ch == 'o' || ch == 'e' || ch == 'i' || ch == 'u' || ch == 'A' || ch == 'E' || ch == 'I' || ch == 'O' || ch == 'U') ;
}
//ll c=0 ;
ll count_vowels(string s  , ll len ){
    //if(len < 0) return;
   if (len < 0)
        return 0;

    return count_vowels(s, len-1) + is_vowel(s[len]);
}


int main() {
   yasmeen_fakhri();

int test =1;
//cin>>test;
while(test--){
string s;
cin.ignore();
getline (cin ,s);
ll len =s.size();
//count_vowels(s,len-1);
  cout<<count_vowels(s,len-1) ;
}
return 0;
}